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Method for strengthening reduction and carbonization of titanium-containing blast furnace slag

A blast furnace slag and reducing agent technology, applied in the direction of improving process efficiency, can solve the problems of increased operation difficulty, shortened reduction period, and large changes, so as to reduce the degree of foaming, strengthen the reaction kinetics, and reduce the viscosity of the system. Effect

Pending Publication Date: 2021-12-28
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN201810785034.4 adopts a two-step reduction and carbonization method, which separates the reduction and carbonization processes, shortens the reduction cycle, reduces power consumption and foaming degree, but the changes to the existing process are relatively large, and the operation difficulty increases

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  • Method for strengthening reduction and carbonization of titanium-containing blast furnace slag

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Experimental program
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Effect test

Embodiment 1

[0032] The TiO of molten titanium-containing blast furnace slag used in this embodiment 2 The content is 28.8%, and the temperature is 1370°C; the specific operation is as follows:

[0033] (1) Import 15t of blast furnace slag into an electric furnace with a capacity of 50t, and simultaneously add 860kg of iron mineral ferric oxide (the addition ratio is 4% of the amount of slag, based on the amount of iron added), so that the two are fully mixed.

[0034] (2) After the addition, start to heat up the electric furnace. After 30 minutes, the temperature is raised to 1520°C, and then 2.1t of anthracite is evenly added to the slag at a speed of 100kg / min (the addition is 14% of the slag mass, and the C content is about 90%, the ash content is 1%, and the 90% particle size is below 10mm), the temperature is maintained for 65 minutes, and the reaction is quenched in water after the end of the reaction.

[0035] During the reaction process, the expansion ratio ranges from 1.46 to 2....

Embodiment 2

[0037] The TiO of molten high-titanium-containing blast furnace slag used in this embodiment 2 The content is 27.9%, and the temperature is 1330°C; the specific operation is as follows:

[0038] (1) Import 15t of blast furnace slag into an electric furnace with a capacity of 50t, and simultaneously add 1700kg of iron mineral ferric oxide (the addition ratio is 8% of the amount of slag, based on the amount of iron added), so that the two are fully mixed.

[0039] (2) After the addition, the electric furnace starts to heat up, and after 30 minutes, the temperature rises to 1560°C, and then 2.1t of anthracite is evenly added to the slag at a speed of 100kg / min (the addition is 14% of the slag mass, and the C content is about 90%, the ash content is 1%, and 90% of the particle size is below 10mm), the temperature is maintained for 58 minutes, and the reaction is quenched in water after the end of the reaction.

[0040] During the reaction process, the expansion ratio ranges from ...

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Abstract

The invention discloses a method for strengthening reduction and carbonization of titanium-containing blast furnace slag. The method for strengthening reduction and carbonization of the titanium-containing blast furnace slag comprises the following steps of: adding molten titanium-containing blast furnace slag and an additive into an electric furnace; and after heating the electric furnace to a preset temperature, adding a reducing agent for reaction, and performing water quenching after the reaction is finished to obtain carbide slag. According to the method for strengthening reduction and carbonization of the titanium-containing blast furnace slag, by adding additive iron mineral, a TiC growth core is provided, TiC crystallization and aggregation are promoted, slag properties are improved, reaction kinetics is strengthened, and the problems of long period, high power consumption, serious foaming and the like of a current titanium-containing blast furnace slag reduction and carbonization process are solved. The process is simple, convenient and easy to implement.

Description

technical field [0001] The invention relates to the technical field of titanium-containing blast furnace slag treatment, in particular to a method for strengthening reduction carbonization of titanium-containing blast furnace slag. Background technique [0002] Panzhihua area is rich in titanium resources, whose reserves account for more than 90% of the country's total, but the overall utilization rate is low. Based on the titanium content in the raw ore, the current smelting process has a titanium recovery rate of only 25%, and the remaining titanium-containing blast furnace slag after blast furnace smelting Medium TiO 2 The content is more than 20%. Since the industrial production of vanadium-titanium-magnetite blast furnace ironmaking has been realized, more than 50 million tons of titanium-containing blast furnace slag have been produced, and it is still increasing at a rate of nearly 4 million tons per year. The annual loss of TiO 2 Reaching more than 1,000,000 tons, r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B1/02C22B34/12
CPCC22B7/04C22B7/001C22B34/1227C22B1/02Y02P10/20
Inventor 张溅波王晓东黄家旭赵青娥
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP